Connecting device confirming insertion of plastic pipe fitting

Abstract

A connecting device that confirms insertion of a plastic pipe fitting comprises a fitting with a through bore that allows pipes 30 to be inserted from both ends. The fitting has internal protrusions 2

Description

BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a connecting device that confirms insertion of plastic pipe fitting, in which the connecting device enables both whether a support sleeve is accurately inserted into the pipe and whether the pipe is reliably inserted to an end portion of the connecting device to be simply and easily confirmed by rotating the pipe inserted into the connecting device and checking whether vibrations are felt (and whether a rattling sound is produced) in a case where pipes are made to communicate with each other through the connecting device. Description of the Related Art Pipe connecting devices have various applications and shapes. The pipe connecting devices connecting two pipes are provided with two sockets into which the respective distal ends of the pipes can be inserted, and are used to connect the two pipes to have an extending length, and the pipe connecting devices integrated with a valve body are used to control a flow of fluid in pipes by opening and closing a valve. If such pipe connecting devices are not reliably fastened to distal ends of the pipes, fluid leakage and seepage will unavoidably occur at an attachment portion. Common pipe connecting devices widely used in the related art are fastened by welding an attachment portion or using separate fastening means such as a screw to enhance connectivity and airtightness. When pipes in which a fluid is transferred are connected using the pipe connecting devices according to the related art, the pipe to be fastened needs to be deeply inserted into a fastening portion formed in the pipe connecting devices and then be reliably fastened. In general, plastic pipes are flexible, and when the plastic pipes are cut, the cut portions often do not form a perfect circle and the plastic pipes are cut in an oval shape. Thus, the plastic pipes need to be used with separate sleeves inserted into ends of the pipes to make the ends of the pipes close to a perfect circle. However, in a case where the sleeves are not used, leakage repair may occur, or the connecting devices may not completely fix the pipes so that the pipes may be detached from the connecting devices, thereby resulting in a problem of leakage . Further, in such pipe connecting devices in the related art, it is not possible for workers to check whether the pipes have been inserted deeply into suitable portions, and thus coupling of the pipe connecting devices is frequently performed with the pipes not being accurately inserted. Accordingly, such pipe connecting devices in the related art have problems such as leakage of a fluid between the pipe connecting devices and the distal ends of the pipes or detachment of the pipes from the pipe connecting devices. Citation List Patent Literature Patent Literature 1: Korean Patent Registration No. 10-2452194 (Registered on October 4, 2022) SUMMARY OF THE INVENTION The present invention is made to solve the above problems, and an object of the present invention is to provide a connecting device that confirms insertion of plastic pipe fitting, the connecting device enabling both whether a support sleeve is accurately and reliably inserted into an end of a pipe and whether the pipe is reliably and completely inserted into an end of the connecting device to be confirmed depending on transmitted vibrations and a sound by a simple operation of rotating the pipe after the pipe is inserted into the connecting device when connecting pipes to each other through the connecting device, by forming multiple first protrusions on a side of a locking surface inside the connecting device with which the end of the pipe comes into contact, inserting the support sleeve into the end of the pipe, and then forming second protrusions on the support sleeve to mount the connecting device on the pipe . Other objects and advantages of the present invention will be described below, and will be understood with embodiments of the present invention. In addition, the objects and advantages of the present invention can be realized by means and combinations represented in claims . According to the present invention, as means to solve the above problems, there is provided a connecting device that confirms insertion of plastic pipe fitting, including: a fitting 10 that has a hollow inside in a longitudinal direction and has connecting holes 12 on both sides which enable respective pipes 30 to be inserted and fastened into; internal sleeves 20 having first protrusions 21 arranged in a circular pattern at preset equal intervals on locking surfaces 14 on inner end sides of the connecting holes 12 with which ends of the pipes 30 are brought into contact, respectively; the plastic pipes 30 that are correspondingly inserted into the connecting holes 12, respectively; and support sleeves 40 that are each inserted and mounted into one end portion of each of the pipes 30 to be exposed outside, have respective front portions being brought into contact correspondingly with the locking surfaces 14, and include respective head portions 41 having second protrusions 44 which correspond to the first protrusions 21 and are formed in a circular pattern at preset equal intervals, and respective body portions 42 that extend from rear ends of the head portions 41 and are inserted into the pipes 30. When the pipes 30 are inserted into the connecting holes 12 and then the pipes 30 are rotated, a feeling of vibrations due to unsmooth and bumpy rotation while the support sleeves 40 are brought into contact with the internal sleeves 20 enables both primary confirmation of recognizing that the support sleeves 40 are inserted into the pipes 30, respectively, and secondary confirmation of recognizing accurate insertion completion of the pipes 30 to respective inner ends of the fitting 10. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view of an embodiment illustrating a fitting according to the present invention. FIG. 2 is a view of an embodiment illustrating an outer sleeve according to the present invention. FIG. 3 is a view of an embodiment illustrating a coupling structure of the outer sleeve and piping according to the present invention. FIG. 4 is a view of an embodiment illustrating a fastened state of the fitting and the piping according to the present invention. FIGS. 5 and 6 are views of an embodiment illustrating an inner fastened state using a connecting device according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Before various embodiments of the present invention are described in detail, it will be known that application thereof is not limited to details of the configurations and arrangements of the components described in the following detailed description or illustrated in the drawings. The present invention can be realized and implemented into other embodiments and can be carried out in various manners. Also, it will be known that expressions and predicates used herein with respect to terms such as device or element orientations (such as "front", "back", "up", "down", "top", "bottom", "left", "right", and "lateral") are used only to simplify the description of the present invention and do not indicate or mean that a device or an element involved should simply have a particular orientation. In addition, terms such as "first" and "second" are used herein and in the accompanying claims for illustrative description and are not intended to indicate or mean relative significance or meaning between the terms. The present invention has the following features to achieve the above-described object. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Before the detailed description, a term or a word used in this specification or claims is not construed as a limited meaning of a common or dictionary meaning but has to be construed as a meaning and a concept in accordance with technical ideas of the present invention based on the principle that an inventor can define a concept of a term in order to describe his or her invention in the best way, as appropriate . Hence, since each embodiment described in this specification and each configuration illustrated in the drawings are provided only as a most preferred embodiment of the present invention and do not represent all of the technical ideas of the present invention, it needs to be construed that there can be various equivalents and modification examples which can substitute for the embodiments and the configurations of the present invention, at the time of this application. Hereinafter, with reference to FIGS. 1 to 6, a connecting device that confirms insertion of a plastic pipe according to a preferred embodiment of the present invention will be described in detail. The connecting device that confirms insertion of a plastic pipe according to the present invention includes a fitting 10, internal sleeves 20, pipes 30, support sleeves 40, and fixing portions 50. The fitting 10 is a connecting unit for connecting the pipes 30 to communicate with each other, has a hollow inside in a longitudinal direction, and has connecting holes 12 on both sides which enable the respective pipes 30 to be inserted and fastened into. The fitting can include a housing 11, fastening holes 13, O-rings 15, grip rings 16, and covers 17. The housing 11 is a housing which serves as an exterior of the fitting and has a hollow inside in a longitudinal direction, and has the connecting holes 12, into which the pipes 30 are inserted, formed inward on both sides, respectively, the fastening holes 13 are holes which are formed inward on both sides of the housing 11 and have a diameter larger than a diameter of the connecting holes 12, O-rings 15 are sealing rings which are fastened in respective ring shapes to outer circumferential edges of the pipes 30 and are positioned in the fastening holes 13, respectively, grip rings 16 are portions which are fastened to the outer circumferential edges of the pipes 30, respectively, and each have one end inserted into the housing 11 through each of the fastening holes 13 and the other end exposed outside the housing 11 at both sides of the housing 11 to prevent the pipes 30 from being detached, and covers 17 are portions which are screwed to outer circumferential edges of the housing 11 while pushing the other end of each of the grip rings 16 toward the housing 11. The internal sleeves 20 have multiple first protrusions 21 arranged in a circular pattern at preset equal intervals on locking surfaces 14 on inner end sides of the connecting holes 12 with which ends of the pipes 30 are brought into contact, respectively. In the case of the locking surfaces 14 having the internal sleeves 20, respectively, each of the locking surfaces has an oblique cross section (' / ') having a diameter gradually increasing in an insertion direction of the pipes 30 to correspond to a narrowing portion 43 of the head portions 41 which becomes round and narrowed toward a front side, and the multiple first protrusions 21 having a tetragonal cross section (rectangular shape) which are arranged continually at equal intervals in an oblique shape on the oblique cross section. Each of the pipes 30 is plastic piping that is correspondingly inserted into each of the aforementioned connecting holes 12, and in the case of the plastic pipe, since a perfectly circular cut surface cannot be obtained when the plastic pipe is cut and used, the support sleeve 40 to be described below needs to be provided at the end to make an insertion portion of the pipe 30 close to a perfect circle, and then the plastic pipe is inserted into the connecting device. However, since there may be cases where the worker mistakenly omit providing the support sleeve 40 to the pipe 30 during construction, the support sleeve 40 has the following configuration in the present invention to also enable whether the pipe 30 and the support sleeve 40 are mounted to be confirmed. The support sleeves 40 are other sleeves which are each inserted and mounted into one end portion of each of the pipes 30 to be exposed outside, have respective front portions being brought into contact correspondingly with the locking surfaces 14, and include respective head portions 41 having second protrusions 44 which correspond to the first protrusions 21 and are formed in a circular pattern at preset equal intervals, and respective body portions 42 that extend from rear ends of the head portions 41 and are inserted into the pipes 30. Each of the support sleeves 40 has a narrowing portion 43 which is formed by making an outer circumferential surface of each of the head portions 41 become round and narrowed toward a front side to correspond to each of the locking surfaces 14 having an oblique cross section. In addition, each of the second protrusions 44 has a shape which is linearly formed to protrude in an 'L' shape bent at a middle point from a front surface toward the outer circumferential surface of each of the head portions 41, and has a width gradually narrowed from the front surface toward the outer circumferential surface. The fixing portions 50 are fixing means that is formed on the rear surfaces of the aforementioned head portions 41 and enables the pipes 30 which are coupled to the support sleeves 40 to be reliably fixed to the rear surfaces of the head portions 41. That is, the fixing portions 50 are provided to prevent the pipes 30 from rotating separately from the support sleeves 40, but to cause the pipes 30 to rotate together with the support sleeves 40 when the pipes 30 are rotated, and include fine protrusions 51 and engagement steps 52. The multiple fine protrusions 51 are protrusions which are formed on the rear surfaces of the head portions 41 that are brought into contact correspondingly with the ends of the pipes 30, respectively, are separated at intervals from each other and arranged in a circular pattern, and have a shape tapering toward the pipes 30 to fix positions of the ends of the pipes 30 brought into contact with the fine protrusions. The engagement steps 52 are plates (a rectangular plate shape curved in an arc along the outer peripheral edges of body portions 42) which are formed around outer circumferential edges of ends of the body portions 42 and obliquely protruded to have a thickness gradually increasing toward the head portions 41 and are steps which enable the pipes 30 to forcibly engage with and be fixed to the body portions 42. In a plastic pipe fitting, the connecting device confirms insertion of fitting of plastic pipes 30 of the present invention has the following effects through the configuration as described above, When the pipes 30 are inserted into the connecting holes 12 and then the pipes 30 are rotated, a feeling of vibrations due to unsmooth and bumpy rotation while the support sleeves 40 are brought into contact with the internal sleeves 20 enables both primary confirmation of recognizing that the support sleeves 40 are inserted into the pipes 30, respectively, and secondary confirmation of recognizing accurate insertion completion of the pipes 30 to respective inner ends of the fitting 10. This eventually enables the insertion completion of the pipe 30 to be confirmed depending on whether vibrations transmitted to a hand occur when the inserted pipes 30 are rotated in the case of inserting the pipe 30 into the fitting 10 in dark places or at night where identification through sight is not easy. It is needless to say that an effect may be obtained in that both whether the support sleeves 40 are accurately inserted and mounted into the pipe and whether the pipes 30 are accurately inserted and mounted to the end portions of the connecting device can be simply and easily confirmed by a worker depending on a rattling locking sound produced due to collision of first and second protrusions 21 and 44 with each other during rotation of the pipes 30, in addition to the vibrations felt when the pipes 30 are rotated. As described above, although the present invention has been described referring to limited embodiments and drawings, the present invention is not limited thereto, and it is needless to say that it is possible for persons with ordinary knowledge in the technical field to which the present invention pertains to variously modify and change the present invention within a range of equivalents of the technical idea and the claims of the present invention to be described below. As described above, the present invention is effective in that both whether a support sleeve is accurately inserted and mounted into a pipe and whether the pipe is accurately inserted and mounted to an end portion of a connecting device can be simply and easily confirmed depending on vibrations felt when the pipe inserted in the connecting device is rotated when the pipes are connected through the connecting device. In addition, the present invention is effective in that both whether the support sleeve is accurately inserted and mounted into the pipe and whether the pipe is accurately inserted and mounted to the end portion of the connecting device can be simply and easily confirmed depending on a rattling locking sound produced due to collision of first and second protrusions with each other during rotation of the pipe, in addition to the vibrations felt when the pipe is rotated. In addition, the present invention is effective in that pipe fastening work can be performed even at night or in a dark place. In addition, the present invention is effective in that, even if the connected pipe is bent or the first protrusions of a locking surface inside the fitting are not in complete contact with the second protrusions of a support sleeve of the pipe, vibrations felt when the pipe is rotated enable insertion and mounting of the pipe to be confirmed. While the present invention has been described with respect to the specific embodiments, it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.

Claims

1. A connecting device that confirms insertion of a plastic pipe fitting, comprising: a fitting 10 that has a hollow inside in a longitudinal direction and has connecting holes 12 on both sides which enable respective pipes 30 to be inserted and fastened into;internal sleeves 20 having first protrusions 21 arranged in a circular pattern at preset equal intervals on locking surfaces 14 on inner end sides of the connecting holes 12 with which ends of the pipes 30 are brought into contact, respectively;the plastic pipes 30 that are correspondingly inserted into the connecting holes 12, respectively; and support sleeves 40 that are each inserted and mounted into one end portion of each of the pipes 30 to be exposed outside, have respective front portions being brought into contact correspondingly with the locking surfaces 14, and include respective head portions 41 having second protrusions 44 which correspond to the first protrusions 21 and are formed in a circular pattern at preset equal intervals, and respective body portions 42 that extend from rear ends of the head portions 41 and are inserted into the pipes 30, whereinwhen the pipes 30 are inserted into the connecting holes 12 and then the pipes 30 are rotated, a feeling of vibrations due to unsmooth and bumpy rotation while the support sleeves 40 are brought into contact with the internal sleeves 20 enables both primary confirmation of recognizing that the support sleeves 40 are inserted into the pipes 30, respectively, and secondary confirmation of recognizing accurate insertion completion of the pipes 30 to respective inner ends of the fitting 10.

2. The connecting device that confirms insertion of aplastic pipe fitting according to claim 1, whereinin a case where the pipes 30 are inserted into the fitting 10 at night or in a dark place where identification through sight is not easy, the inserted pipes 30 are rotated to confirm the insertion completion of the pipes 30 by whether vibrations transmitted to a hand occur during rotation.

3. The connecting device that confirms insertion of a plastic pipe fitting according to claim 1, whereineach of the locking surfaces 14 has an oblique cross section having a diameter gradually increasing in an insertion direction of the pipes 30 to correspond to a narrowing portion 43 of the head portions 41 which becomes round and narrowed toward a front side, andthe multiple first protrusions 21 having a tetragonal cross section are arranged continually at equal intervals in an oblique shape.

4. The connecting device that confirms insertion of a plastic pipe fitting according to claim 1, whereineach of the support sleeves 40 has a narrowing portion 43 which is formed by making an outer circumferential surface of each of the head portions 41 become round and narrowed toward a front side to correspond to each of the locking surfaces 14 having an oblique cross section, andeach of the second protrusions 44 has a shape which is linearly formed to protrude in an 'L' shape bent at a middle point from a front surface toward the outer circumferential surface of each of the head portions 41, and has a width gradually narrowed from the front surface toward the outer circumferential surface.

5. The connecting device that confirms insertion of a plastic pipe fitting according to claim 1, wherein fixing portions 50 that are formed on the rear surfaces of the head portions 41 and enable the pipes 30 which are coupled to the support sleeves 40 to be reliably fixed to the rear surfaces of the head portions 41.

6. The connecting device that confirms insertion of a plastic pipe fitting according to claim 1, wherein the fixing portions 50 include, in order to prevent the pipes from rotating separately from the support sleeves and to cause the pipes to rotate together with the support sleeves 40 when the pipes 30 are rotated, multiple fine protrusions 51 which are formed on the rear surfaces of the head portions 41 that are brought into contact correspondingly with the ends of the pipes 30, respectively, are separated at intervals from each other and arranged in a circular pattern, and have a shape tapering toward the pipes 30, and engagement steps 52 which are formed on outer circumferential edges of ends of the body portions 42, obliquely protruded having a thickness gradually increasing toward the head portions 41, and enable the pipes 30 to forcibly engage with and be fixed to the body portions 42.

7. The connecting device that confirms insertion of a plastic pipe fitting according to claim 1, wherein the fitting 10 includes a housing 11 which has the hollow inside in the longitudinal direction and has the connecting holes 12, into which the pipes 30 are inserted, formed inward onboth sides, respectively,fastening holes 13 which are formed inward on both sides of the housing 11 and have a diameter larger than a diameter of the connecting holes 12, O-rings 15 which are fastened in respective ring shapes to outer circumferential edges of the pipes 30 and are positioned in the fastening holes 13, respectively, grip rings 16 which are fastened to the outer circumferential edges of the pipes 30, respectively, and each have one end inserted into the housing 11 through each of the fastening holes 13 and the other end exposed outside the housing 11 at both sides of the housing 11 to prevent the pipes 30 from being detached, and covers 17 that are screwed to outer circumferential edges of the housing 11 while pushing the other end of each of the grip rings 16 toward the housing 11.

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